The Alfa Romeo AR 67303 is a 1,750 cc, inline — four turbocharged petrol engine produced between 2016 and 2020. It serves as a higher — tuned evolution of the AR 67299 platform, delivering 177 kW (240 PS) and 340 Nm of torque. This engine features direct fuel injection, dual variable valve timing (Dual VVT), and a compact BorgWarner EFR turbocharger, enabling rapid throttle response and strong mid — range performance typical of Alfa Romeo's sport — focused engineering.
Fitte…
All production years (2016–2020) comply with Euro 6b emissions standards (VCA UK Type Approval #VCA/EMS/5679).
The Alfa Romeo AR 67303 is a 1,750 cc inline‑four turbocharged petrol engine engineered for high-performance applications (2016–2020). It combines direct fuel injection with dual variable valve timing and a high-flow turbocharger to deliver race-inspired throttle response and sustained power output. Designed to meet Euro 6b emissions standards, it integrates performance with regulatory requirements.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,750 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 84.0 mm × 78.0 mm | |
Power output | 177 kW (240 PS) @ 5,700–6,500 rpm | |
Torque | 340 Nm @ 2,000–4,500 rpm | |
Fuel system | Direct injection (up to 200 bar) | |
Emissions standard | Euro 6b | |
Compression ratio | 9.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single BorgWarner EFR turbo with internal wastegate | |
Timing system | Chain-driven (integrated in rear cover) | |
Oil type | SAE 5W-40, API SN/CF, ACEA A3/B4 | |
Dry weight | 128 kg |
The Alfa Romeo AR 67303 was used in Alfa Romeo's high-performance 952/956 platforms with longitudinal mounting and rear-wheel-drive layout. This engine received performance-specific adaptations—forged internals, high-flow turbo, and charge cooling—from launch. From 2018, the Stelvio Quadrifoglio adopted the same calibration as the Giulia, with identical ECU maps and boost curves. All variants are documented in OEM technical bulletins and require specific service procedures.
The AR 67303's primary reliability risk is thermal stress on the turbocharger actuator and intercooler plumbing under sustained high-load driving. Internal Alfa Romeo field reports from 2020 indicated a moderate incidence of intercooler pipe leaks in track-driven examples, while UK DVSA records show few emissions-related MOT failures due to robust emissions calibration. Aggressive driving and poor maintenance increase risk, making oil quality and cooling system integrity critical.
Analysis derived from Alfa Romeo technical bulletins (2016-2020) and UK DVSA failure statistics (2017-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The AR 67303 is a high-performance engine designed for spirited use. When maintained properly—with regular oil changes using 5W-40 ACEA A3/B4 oil and premium fuel (RON 98)—it is dependable. Track use increases thermal stress, so cooling system maintenance and post-drive idle periods are recommended. No widespread reliability issues have been reported in official Alfa Romeo bulletins.
The most frequent issues include turbo wastegate actuator sticking, intercooler pipe leaks under boost, and timing chain tensioner wear. These are typically maintenance-related. Oil leaks from the valve cover gasket are also observed in higher-mileage examples. All are serviceable using OEM procedures and parts.
This 2.0L turbo petrol engine is exclusive to the Giulia Quadrifoglio (2016–2020) and Stelvio Quadrifoglio (2017–2020). It delivers 240 PS in both applications and features performance-specific tuning, cooling, and intake systems. Production spanned 2016–2020, with all models meeting Euro 6b emissions standards.
Yes, though cautiously. The engine responds well to ECU remapping, with stage 1 tunes adding +30–50 kW. However, the stock turbo and internals are already highly stressed. Enthusiasts often upgrade intercoolers, fuel systems, and exhausts for higher stages. Tuning should only be done with supporting modifications and high-octane fuel to avoid knock or mechanical failure.
Moderate to high consumption. In a Giulia Quadrifoglio, combined consumption is ~9.8 L/100km (~29 mpg UK). City driving may exceed 12 L/100km, while highway runs can achieve 7.5 L/100km. Real-world figures depend heavily on driving style, but expect 25–30 mpg (UK) on mixed routes for a healthy engine.
Yes. The AR 67303 is an interference engine. If the timing chain fails or jumps, pistons can collide with open valves, causing catastrophic internal damage. Proper maintenance and timely replacement of tensioners and guides are essential to prevent costly repairs.
Alfa Romeo specifies SAE 5W-40 synthetic oil meeting ACEA A3/B4 standards. Use only API SN/CF rated oils designed for turbocharged petrol engines. Change intervals should not exceed 10,000 km or 12 months to ensure turbo and timing system lubrication and prevent deposit formation.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with ALFA-ROMEO or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
ALFA-ROMEO Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialALFA-ROMEO documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.